node/test/parallel/test-dns-setserver-when-querying.js
Ruben Bridgewater e038d6a1cd
test: refactor common.expectsError
This completely refactors the `expectsError` behavior: so far it's
almost identical to `assert.throws(fn, object)` in case it was used
with a function as first argument. It had a magical property check
that allowed to verify a functions `type` in case `type` was passed
used in the validation object. This pattern is now completely removed
and `assert.throws()` should be used instead.

The main intent for `common.expectsError()` is to verify error cases
for callback based APIs. This is now more flexible by accepting all
validation possibilites that `assert.throws()` accepts as well. No
magical properties exist anymore. This reduces surprising behavior
for developers who are not used to the Node.js core code base.

This has the side effect that `common` is used significantly less
frequent.

PR-URL: https://github.com/nodejs/node/pull/31092
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
2019-12-31 15:54:20 +01:00

30 lines
632 B
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
const dns = require('dns');
const localhost = [ '127.0.0.1' ];
{
// Fix https://github.com/nodejs/node/issues/14734
{
const resolver = new dns.Resolver();
resolver.resolve('localhost', common.mustCall());
assert.throws(resolver.setServers.bind(resolver, localhost), {
code: 'ERR_DNS_SET_SERVERS_FAILED',
message: /^c-ares failed to set servers: "There are pending queries\." \[.+\]$/g
});
}
{
dns.resolve('localhost', common.mustCall());
// should not throw
dns.setServers(localhost);
}
}